Concrete Pipe & Box Culvert Installation - Shaw Precast Solutions

•••••stubs properly grouted and pluggedhookups, diversions and connections properlymadecatch basins and inlets properly connectedmanhole frames and covers properly installedsurface restoration and all other items pertinentto the construction properly completed.INFILTRATIONThe infiltration of excessive ground water into asanitary sewer can overload the capacity of a sewercollection system and treatment facilities. The infiltrationtest, conducted in accordance with ASTMC 969 (C 969M), is intended to demonstrate theintegrity of the installed materials and constructionprocedures, as related to the infiltration of groundwater, and therefore, is only applicable if the watertable level is at least 2 ft. (600 mm) above the crownof the pipe for the entire length of the test section.Although the test is a realistic method of determiningwater tightness, there are inherent difficultiesin applying the test criteria because of seasonalfluctuations in the water table and the problem ofcorrelating high ground water level conditions withactual test conditions.Before conducting the test, the water table shouldbe allowed to stabilize such that water completelysurrounds the pipe during the test period. The testis usually conducted between adjacent manholeswith the upstream end of the sewer bulkheaded ina suitable manner to isolate the test section. Allservice laterals, stubs and fittings should be properlyplugged or capped at the connection to thetest pipe section to prevent the entrance of groundwater at these locations. A V-notch weir or othersuitable measuring device should be installed in theAmerican Concrete Pipe Association • www.concrete-pipe.org 53